Pole connecter of electric batteries



June 26, 192s. A1,675,114

v R. J. LIAIRD POLE coumic'rsn orf'fc'rnrc BATTERIES Fileq sappige. 192'! @y 0W; AWM@ 5MM,

Patented June `1928i.

ROBERT JOSEPH LAIRD, OF AUCKLAND, ZEALAND.

POLE CONNECTER OF ELECTRIC BATTERIES.

Application led September 8, 1927, Serial No. 218,153, and in New Zealand July 12, 192,7.

This invention relates more particularly to the storage batteries used in the ignition systems of motor vehicles and it has been devised with the object of providing a safeguard against possibility of trouble arising through a short circuiting of the batteryV controlled circuit when the vehicle is left standing or in storage.

This safeguard is provided by a special construction of the lead connecter of vone of the battery poles (preferably the negative` The invention consists in the construction of the connecter' for the pole electrode in two parts one of which forms one with the electrode while the other is mounted loosely upon and insulated from the electrode and has the lead attached to it, and which parts are normally keptout of electric contact by means of a spring, and are forced into electric contact by a thumb nut.

A suitable manner of carrying out the invention is illustrated in the accompanying drawings, which shows the connecter in sectional elevation upon a battery cell.

In this construction of the invention, the

i' pole electrode A is formed or provided with a flange B upon its top end and with a pin C projectingy upward from the centre thereof. The top end of this pin is screw threaded.

The connecter over such pin and is shaped with a flange E projecting out from its lower end, that is adapted to engage face to face with the flange B and when in such engagement to make a full electric contact with the electrode. The lead wire F is secured to the collar in the usual way. f

The-underside of the collar E is formed with a recess G therein, and within such recess, a compression spring H is placed, the said spring surrounding the pin C. This spring serves to normally force the collar up so that the flanges E and B are apart.

part.

collar D is made to slip A thumb nut J is, however, screwed on to` the top o-f the pin C for forcing the collar down to cause the flanges to make close electric contact for the ordinary use ofthe battery; l

The collar proper 1s insulated .from the pole pin Cv and the thumb nut J, as also from the spring H, by providing its bore with a sleeve K of suitable insulating ma- 'l terialwhich sleeve at its ends covers the top surface with which lthe thumb nut engages and the top of the recess G with which the spring engages.

The collar' is thus completel insulated from the electrode excepting t rough the contact effected between the flanges B and E. Consequently when such flanges are in contact the connecter is in working order. By loosening the thumb nut J the collar is allowed to be forced up on the pin thus breakingthe connection of the flanges and placing the battery out of working order.

The said means may he varied in a number of ways in the details of their construction and without departing from the essential feature of the invention.

1. In electric batteries, a pole connecter formed in two parts one of which is made in one with the pole electrode while the' other has the lead wire connected to it and In electric batteries, the combination with a pole electrode constructed or provida pin projecting centrally therefrom, of a connecter collar loosely mounted upon such pin and insulated therefrom and constructed to form electric contact with the said iange, a spring normally forcin the said collar out of contact with the ange and means for forcing and locking it in contact with the flange, substantially for the purposes specified.

3. In electric batteries the combination with a pole electrode constructed or provided with a ange uponits upper end and c ed with a flange on itsupper end and with lar out of contact with the ange, and a thumb nut screwed on to the top of the said pin and engaging the collar, substantially as 10V spec1fed.

In testimony whereof, I .aiix` my signature.

ROBERT JOSEPH LAIRD. 

